A girl's mass increased by 12% between her tenth and fourteenth birthdays. If her masss was 45 kg on her tenth birthday, what was her mass on her fourteenth birthday?
The answer in the answers section of the text book is 50.4 kg
What do I do?
Please help me!!!!!!!!!!!!!!
The answer in the answers section of the text book is 50.4 kg
What do I do?
Please help me!!!!!!!!!!!!!!
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What is 12% of 45 ?
Percent means per hundred. 12% is 12/100 or 0.12 . You can find 12% of 45 easily. Once you find that, you add it to 45. You will get 50.4 .
If it helps you, please accept and vote the answer.
Percent means per hundred. 12% is 12/100 or 0.12 . You can find 12% of 45 easily. Once you find that, you add it to 45. You will get 50.4 .
If it helps you, please accept and vote the answer.
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The book is 100% right. The answer is 45 kg + 5.4 kg = 50.4 kg.
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old mass = 45kg
new mass
= 45 + 12% of 45
= 45(1 + 0.12)
= 45 * 1.12
=.....
new mass
= 45 + 12% of 45
= 45(1 + 0.12)
= 45 * 1.12
=.....
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45/100 =x/112
(45 * 112)/100 = 50.4 kg.
(45 * 112)/100 = 50.4 kg.